Your answer is not right,
(3X) X ^( 2/3 ) / 3X = 1/ ( 3x ) ^1/3 this is not any simplification, only use of negative exponent.
only way is to write in the radical form
(3X ) ^ 1/3 = ^{3}√3X
2.  x ^2 Y^2 =  X ^( 3/2) . Y ^2
X ^1/2 Y ^{0}
Apr 20

Parviz F.
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